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Surface modification of montmorillonite with novel modifier and preparation of polystyrene/montmorillonite nanocomposite by in situ radical polymerization

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Abstract

Exfoliated polystyrene/organo-modified montmorillonite nanocomposite was synthesized through in situ free radical polymerization by dispersing a modified reactive organophilic montmorillonite layered silicate in styrene monomers. The original montmorillonite (MMT) was modified by a novel cationic surfactant. A cationic initiator, consisting of a quaternary ammonium salt moiety, α-phenyl chloro acetyl chloride moiety, and 9-decen-1-ol moiety, was intercalated into the interlayer spacing of the layered silicate. Modified MMT clays were then dispersed in styrene monomers and subsequently polymerized by a free-radical in situ polymerization reaction to yield polystyrene/montmorillonite nanocomposite. The structure of obtained modifier was investigated by proton nuclear magnetic resonance (1H NMR) and Fourier-transform infrared (FT-IR) spectroscopy. The exfoliating structure of nanocomposite was probed by X-ray diffraction (XRD) and transmission electron microscopy (TEM). Comparing with pure polystyrene, the nanocomposite showed much higher decomposition temperature and higher glass transition temperature (Tg).

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Abbreviations

MMT:

Montmorillonite

O-MMT:

Organo-modified montmorillonite

CEC:

Cation exchange capacity

PS:

Polystyrene

XRD:

X-ray diffraction

AIBN:

Azobisisobutyronitrile

TEM:

Transmission electron microscopy

Tg :

Glass transition temperature

DSC:

Differential scanning calorimetry

TGA:

Thermogravimetric analysis

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Acknowledgment

The authors express their gratitude to the Bonyade Melli Nokhbeghan institute and Payame Noor University for supporting of this project.

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Authors and Affiliations

  1. Lab. of Polymer, Faculty of Chemistry, Payame Noor University, Tabriz, 5158654778, Iran

    Mehdi Jaymand

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  1. Mehdi Jaymand
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Correspondence to Mehdi Jaymand.

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Jaymand, M. Surface modification of montmorillonite with novel modifier and preparation of polystyrene/montmorillonite nanocomposite by in situ radical polymerization. J Polym Res 18, 957–963 (2011). https://doi.org/10.1007/s10965-010-9495-0

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  • DOI: https://doi.org/10.1007/s10965-010-9495-0

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